I am installing mine tonight; I'll have some complete hours for you ...
NOTE:
"This is considering I have probably every tool any good Suzuki shop has if not more (except for specialty) being an engineer for 26 years with GM... All air tools, Allen sockets, swivel sockets etc. About $300,000.00 in SAE and metric Snap-On tools"
I removed the cowls yesterday and the factory exhaust. Knowing now what's involved and exactly where everything is I could do both cowls and the lower in 30 minutes next time. The oil cooler and radiator were quick and the exhaust was off in another 15 minutes using an air ratchet and the correct metric Allen sockets. (Care taken to alternate the removal slowly on each of the two header bolts or the tension will bend bolts)
I will update on the assembly as that will take a little longer. I high temp spray paint the insides of my headers and bake them in with the exhaust, doing this 3 times. I have always done this (Old hot rodding tip) with chrome or stainless headers on cars and bikes and never do I get a tint of blue or purple on them. The most important part is that you compensate for the leanness you will create ASAP. Also removing any oils including from your hands from the pipes with alcohol before bringing them up to temp.
My guess right now (with an experienced tech and proper tools) would be no more then 2-3 hours and that's being generous. With the cowls off etc. I also installed my adjustable lowering links and Power commander in short time.